gentoo-overlay/dev-lang/rust/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>rust@gentoo.org</email>
    <name>Rust Project</name>
  </maintainer>
  <use>
    <flag name="extended">Build and install rls, rustfmt and cargo
    alongside the compiler and stdlib</flag>
    <flag name="cargo">Install cargo component</flag>
    <flag name="clippy">Install clippy component</flag>
    <flag name="jemalloc">Use <pkg>dev-libs/jemalloc</pkg> as the
    standard memory allocator</flag>
    <flag name="rls">Install rls component</flag>
    <flag name="rustfmt">Install rustfmt component</flag>
    <flag name="wasm">Build support for the wasm32-unknown-unknown
    target</flag>
  </use>
</pkgmetadata>